REMEMBER!!!! Flashcards
What is the tests for sulfur dioxide?
Add potassium permanganate paper
(if present, it will turn from purple to colourless)
What is the test for ammonia?
Add damp litmus paper (turns blue if ammonia is present)
What is the test for carbon dioxide?
Bubble the gas through limewater (if present, white precipitate forms)
What is the test for chlorine?
Add damp blue litmus paper (if chlorine is present, it will turn red)
What is the test for hydrogen?
Add a lit splint (produces a squeaky pop and goes out if hydrogen is present)
What is the test for oxygen?
Add a glowing splint (blow it out) - (if oxygen present, it will relight)
How identify positive ions? (metals)
- Add sodium hydroxide (insoluble)
- Flame test
Flame test positive result for barium?
light green
Flame test positive result for calcium?
orange-red
Flame test positive result for copper (II)
blue-green
Flame test positive result for lithium?
red
Flame test positive result for potassium?
lilac
Flame test positive result for sodium?
yellow
How to test for carbonates?
bubble through limewater. dilute acids added to carbonate should fizz and produce CO2
How to test for halides?
Add dilute nitric acid, then silver nitrate.
- If a precipitate forms, a halide ion is present
white = chloride
bromide = cream
iodide = yellow
**more down group 7, the more off white it goes)
How to test for sulphates?
Add dilute hydrochloric acid, then barium chloride solution. White precipitate indicates presence of sulphate ions.
How to remember reactivity series?
please send cats, monkeys and cute zebras into hot countries, signed, gordon
what type of salts are soluble?
- all sodium, potassium and ammonium salts
- all nitrates
- most chlorides, bromides and iodides
- most sulphates (except lead, barium and calcium
- sodium, potassium and ammonium carbonates
- sodium, potassium, ammonium and calcium hydroxides
Insoluble salts:
- silver and lead halides
- lead, barium and calcium sulphates
- most carbonates (except sodium, potassium and ammonium)
- most hydroxides (except for potassium and ammonium)
metal + acid makes?
salt + hydrogene
metal oxide + acid
salt + water
metal hydroxide + acid
salt + water
metal carbonate + acid
salt + water + carbon dioxide
